Lathe attachment.



W. A. PIERCE.

LATHE ATTACHMENT. 7 APPLIOATION FILED APR.,1B, 1913. 1,099,816, Patented June 9,1914.

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W. A. PIERCE.

LATHE ATTACHMENT. APPLICATION FILED APR.18, 1913.

1,099,816, fatented June 9,1914.

2 SHEETS-SHEET 2.

i n i 5 n a illl I mil m WITED STATES PATENT OFFICE.

WILLIAM A. PIERCE, OF ARROYO GRANDE, CALIFORNIA.

LATHE ATTACHMENT.

To all whom it may concern Be it known that I, WILLIAM A. PIERCE, a citizen of the United States, residing at Arroyo Grande, in the county of San Luis Obispo and State of California, have invented new and useful Improvements in Lathe Attachments, of which the following is a specification.

This invention relates to a portable lathe attachment for machines having band wheels or the like, which it is desired to turn down to a smaller diameter, or to otherwise true up to account for wear, the primary object being to provide a device of this character which is simply constructed and consists of the fewest possible number of parts so as to be inexpensive in the cost of manufacture and which is adapted to be attached readily to a machine in suitable proximity to its band wheel, or other rotary object to be operated upon.

A further object of the invention is to provide a lathe attachment of the class set forth, which is capable of rigidly securing the cutting tool in different longitudinally and laterally adjusted positions and wherein readily operable means is provided for adjusting the said tool.

The invention consists in the features of construction, combination and arrangement of parts, hereinafter fully described and claimed, reference being had to the accompanving drawin s in which:

Figure 1 is a fragmentary front elevation of the device in use; Fig. 2 is a top plan view of the same; Fig. 3 is a transverse sectional view taken on the line 33 of Fig. 1; and, Fig. 4 is a longitudinal sectional view on line 44 of Fig. 2.

In the drawings, 1 designates the separable frame of the lathe, which is composed of the parallel front and rear plates 2 and 3, and the connecting end plates 4 and 5 secured to the former by means of the bolt members 6. All of these plates are vertically disposed and the frame as a whole is portable and adapted to be secured to the bed 7 of a machine having a band wheel which is to be slightly remodeled, by means of the attaching bolts 8, which latter connect the lugs 9 provided upon the end plates of the frame with the machine bed.

The front and rear plates 2 and 3 of the frame 1 are provided with longitudinally Specification of Letters Patent.

Application filed April 18, 1913.

Patented June 9, 1914.

Serial No. 761,981.

extending, horizontally alining guide slots 10 and 11 for the slidable reception of the flanges 12 and 13 provided upon the front and rear faces of a slide block 14. The block 14 is provided with a transversely extending, threaded opening 15 receiving the threaded adjusting rod 16 mounted rotatably within openings 17 and 18 provided in the end plates 4 and 5, respectively, of the frame 1. A hand wheel 19 is provided upon the outer end of the rod 16 adjacent the frame plate 4 so as to afford means by which the slide block may be adjusted longitudinally within the frame.

The block 14 is provided with a clovetailed guide slot 20 in its upper face extending at right angles to the longitudinal axis of the frame 1 for the slidable reception of the similarly shaped rib 21 provided upon the end face of a tool holder 22. The tool holder is provided with a socket 23 for the reception of any one of the usual cutting tools, such as the tool indicated by the numeral 24, and a vertically adjustable set screw 25 is threaded within an opening 26 in the holder body for engagement with the tool shank within the socket.

An L-shaned member 27 has its horizontal arm 28 slidably mounted within a horizontal slot 29 provided in the front plate 2 of the frame 1 beneath the slot 10, its inner end being detachably secured by means of the bolt members 30 to the end face of the slide block 14. The vertical arm 31 of the member 27 is connected with the guide flange 13 of the block 14 by means of a bolt member 32, and an adjusting screw member 33 is rotatably mounted within an opening 34 provided in the upper end of the vertical arm 31 of the member 27, its inner end being threaded as at 35 for reception within the threaded opening 36 of the tool holder 22.

In using the device upon a machine for truing-up its hand wheel, the required tools may be positioned within the tool holder socket and secured therein by means of the set screw 25 in their respective order for use in performing the desired operations upon the wheel. In using any particular tool, the tool holder 22 may be moved longitudinally and laterally with respect to the axis of the revolving work by operating the screw members 16 and 38, respectively, in

a manner which should be readily apparent to those skilled in the art to which this invention appertains.

Having thus described my invention, what I claim is:

A device of the class described comprising an elongated rectangular frame, the longitudinal vertical walls of the frame being parallel and provided with transversely alining horizontal slots, a slide block mounted within the frame for longitudinal movement, lateral flanges provided upon said block for. sliding engagement within the frame slots, means by which the slide block may be operated longitudinally within the frame, the said slide block being provided in its upper face with a transverse guide-way, a tool holder mounted for hori- 'zontal movement within the said guide-way,

one slotted wall of the frame being provided with another slot coextensive with the first slot and disposed beneath .the same at the level of the under face of the slide block, an L-shaped member having its horizontal arm projecting inwardly through the lastnamed wall slot of the frame, means for securing this arm of the member detachably to the under face of the slide block, the vertical arm of the said member being extended upwardly past the upper edge of the frame Wall, means for securing the vertical arm detachably to the outer side face of the adjacent slide block flange, and means carried by the vertical arm of the said member by which the tool holder may be adjusted upon the slide block.

In testimony whereof I afiix my signature in presence of two witnesses.

WILLIAM A. PIERCE. Witnesses:

J. M. EMLIERT, H. G. MGNEIL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

7 Washington, D. G. 

